DMARC.AI

DMARC isn’t standing still. Here’s where email authentication is heading: tightening provider rules, BIMI adoption, MTA-STS, and emerging standards.

Secure email gateways sit in the mail flow and affect authentication. Here’s how SEGs interact with DMARC, SPF, and DKIM — and the common gotchas.

The 2026 email security stack is DMARC, BIMI, MTA-STS, and TLS-RPT. Here’s how each fits and why the combination is the new baseline.

TLS-RPT delivers JSON reports when senders can’t establish TLS to your domain. Here’s how to publish it, read the reports, and act on what they reveal.

MTA-STS turns opportunistic TLS into enforced TLS, closing downgrade-attack vectors. Here’s the specific security gain and what it adds to DMARC.

MTA-STS enforces TLS on incoming SMTP. TLS-RPT reports when it fails. Here’s how the two interlock and why you should deploy both together.

MTA-STS forces TLS on incoming SMTP — preventing downgrade attacks that intercept email in transit. Here’s how it works and why businesses should deploy it.

A concrete checklist for getting email authentication right: SPF, DKIM, DMARC, BIMI, MTA-STS. Tick each box once and the rest is monitoring.

SPF best practices that hold up in 2026: lookup budgets, alignment, include hygiene, and the patterns that survive scaling.

DKIM is the cryptographic signature that proves a message came from your domain. Here’s how it works, why DMARC relies on it, and how to set it up.